C8051F85X86X Datasheet, PDF (12/290 Pages) Silicon Laboratories – Low-Cost 8-bit MCU Family with up to 8 kB of Flash

C8051F85x/86x
Table 1.7. ADC
Parameter
Symbol
Test Condition
Resolution
N_bits
12 Bit Mode
10 Bit Mode
Throughput Rate
f_S
(High Speed Mode)
12 Bit Mode
10 Bit Mode
Throughput Rate
f_S
(Low Power Mode)
12 Bit Mode
10 Bit Mode
Tracking Time
t_TRK
High Speed Mode
Low Power Mode
Power-On Time
SAR Clock Frequency
t_PWR
f_SAR
High Speed Mode,
Reference is 2.4 V internal
High Speed Mode,
Reference is not 2.4 V internal
Low Power Mode
Conversion Time
t_CNV
10-Bit Conversion,
SAR Clock = 12.25 MHz,
System Clock = 24.5 MHz.
Sample/Hold Capacitor
C_SAR
Gain = 1
Gain = 0.5
Input Pin Capacitance
Input Mux Impedance
Voltage Reference Range
Input Voltage Range*
C_IN
R_MUX
V_REF
V_IN
Gain = 1
Gain = 0.5
Power Supply Rejection
Ratio
DC Performance
PSRR_ADC
Integral Nonlinearity
INL
12 Bit Mode
10 Bit Mode
Differential Nonlinearity 
(Guaranteed Monotonic)
DNL
12 Bit Mode
10 Bit Mode
*Note: Absolute input pin voltage is limited by the V_DD supply.
Min Typ Max Unit
12
Bits
10
Bits
—
—
200 ksps
—
—
800 ksps
—
— 62.5 ksps
—
—
250 ksps
230 —
—
ns
450 —
—
ns
1.2
—
—
µs
—
— 6.25 MHz
—
— 12.5 MHz
—
—
4
MHz
1.1
µs
—
5
—
pF
—
2.5
—
pF
—
20
—
pF
—
550
—

1
—
V_DD
V
0
—
V_REF
V
0
— 2xV_REF V
—
70
—
dB
—
±1 ±1.9 LSB
— ±0.2 ±0.5 LSB
–1 ±0.7 1.8 LSB
— ±0.2 ±0.5 LSB
12
Preliminary Rev 0.6